Re: [dpdk-dev] [PATCH v2 0/4] DPDK memcpy optimization

["Fu, JingguoX" <jingguox.fu@intel.com>]

Basic Information

        Patch name        DPDK memcpy optimization v2
        Brief description about test purpose    Verify memory copy and memory copy performance cases on variety OS
        Test Flag         Tested-by
        Tester name       jingguox.fu at intel.com

        Test Tool Chain information     N/A
	  Commit ID	88fa98a60b34812bfed92e5b2706fcf7e1cbcbc8
        Test Result Summary     Total 6 cases, 6 passed, 0 failed
        
Test environment

        -   Environment 1:
            OS: Ubuntu12.04 3.2.0-23-generic X86_64
            GCC: gcc version 4.6.3
            CPU: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
            NIC: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ [8086:10fb] (rev 01)

        -   Environment 2: 
            OS: Ubuntu14.04 3.13.0-24-generic
            GCC: gcc version 4.8.2
            CPU: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
            NIC: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ [8086:10fb] (rev 01)

            Environment 3:
            OS: Fedora18 3.6.10-4.fc18.x86_64
            GCC: gcc version 4.7.2 20121109
            CPU: Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
            NIC: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ [8086:10fb] (rev 01)

Detailed Testing information

        Test Case - name  test_memcpy
        Test Case - Description 
                  Create two buffers, and initialise one with random values. These are copied 
                  to the second buffer and then compared to see if the copy was successful. The 
                  bytes outside the copied area are also checked to make sure they were not changed.
        Test Case -test sample/application
                  test application in app/test
        Test Case -command / instruction
                  # ./app/test/test -n 1 -c ffff
                  #RTE>> memcpy_autotest
        Test Case - expected
                  #RTE>> Test	OK
        Test Result- PASSED

        Test Case - name  test_memcpy_perf
        Test Case - Description
                  a number of different sizes and cached/uncached permutations
        Test Case -test sample/application
                  test application in app/test
        Test Case -command / instruction
                  # ./app/test/test -n 1 -c ffff
                  #RTE>> memcpy_perf_autotest
        Test Case - expected
                  #RTE>> Test	OK
        Test Result- PASSED


-----Original Message-----
From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Zhihong Wang
Sent: Thursday, January 29, 2015 10:39
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH v2 0/4] DPDK memcpy optimization

This patch set optimizes memcpy for DPDK for both SSE and AVX platforms.
It also extends memcpy test coverage with unaligned cases and more test points.

Optimization techniques are summarized below:

1. Utilize full cache bandwidth

2. Enforce aligned stores

3. Apply load address alignment based on architecture features

4. Make load/store address available as early as possible

5. General optimization techniques like inlining, branch reducing, prefetch pattern access

--------------
Changes in v2:

1. Reduced constant test cases in app/test/test_memcpy_perf.c for fast build

2. Modified macro definition for better code readability & safety

Zhihong Wang (4):
  app/test: Disabled VTA for memcpy test in app/test/Makefile
  app/test: Removed unnecessary test cases in app/test/test_memcpy.c
  app/test: Extended test coverage in app/test/test_memcpy_perf.c
  lib/librte_eal: Optimized memcpy in arch/x86/rte_memcpy.h for both SSE
    and AVX platforms

 app/test/Makefile                                  |   6 +
 app/test/test_memcpy.c                             |  52 +-
 app/test/test_memcpy_perf.c                        | 220 ++++---
 .../common/include/arch/x86/rte_memcpy.h           | 680 +++++++++++++++------
 4 files changed, 654 insertions(+), 304 deletions(-)

-- 
1.9.3